11609
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13440
- Proper Divisor Sum (Aliquot Sum)
- 1831
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9936
- Möbius Function
- -1
- Radical
- 11609
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 143
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- First run of n consecutive integers with same number of divisors ends at a(n).at n=4A019273
- Numbers whose set of base-14 digits is {3,4}.at n=22A032838
- Numbers k such that k and its reversal are both multiples of 19.at n=33A062907
- Non-palindromic number and its reversal are both multiples of 19.at n=23A062916
- Antidiagonal sums of triangle A092422, which is generated from the even-numbered Fibonacci polynomials (A011973).at n=17A092424
- Structured meta-anti-prism numbers, the n-th number from a structured n-gonal anti-prism number sequence.at n=12A100185
- a(n) = prime(2*n^2) - 2*n^2.at n=27A141086
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.at n=8A149286
- a(n) = 4*n^2 - n - 1.at n=54A185950
- Number of zero-sum -n..n arrays of 4 elements with first and second differences also in -n..n.at n=21A201875
- a(n) = smallest number greater than n, equal to the determinant of the circulant matrix formed by its base-n digits.at n=40A219357
- a(n) = floor(M(g(n-1)+1,..,g(n))), where M = harmonic mean and g(n) = n*(n + 1)*(n + 2)*(n + 3)/24.at n=21A227018
- Number of partitions of n such that no part is a sum of two other parts.at n=46A236912
- Number of partitions of n such that (number parts having multiplicity 1) is a part and (number of parts > 1) is not a part.at n=38A241513
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 20", based on the 5-celled von Neumann neighborhood.at n=43A269713
- Sum of first n Honaker primes.at n=10A276255
- Growth of the Lamplighter group: number of elements in the Lamplighter group L_2 = Z/2Z wr Z of length up to n with respect to the standard generating set {a,t}.at n=14A294683
- Number of nX6 0..1 arrays with every element unequal to 0, 1, 2 or 3 king-move adjacent elements, with upper left element zero.at n=11A303725
- Number of partitions of n with eight parts in which no part occurs more than twice.at n=36A320596
- Triangle read by rows: the n-th row gives the least sequence of n consecutive numbers with the same number of divisors.at n=14A376557